Question: What is the number of out of school children of North America at 2008-1-1?
Paraphrase: How many children out of school in North America in 2008-1-1?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q49 p:P2573 ?s . ?s ps:P2573 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2008')) }